package udpTest;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;

public class Test {

	public static void main(String[] args) throws Exception {
		FileOutputStream out = new FileOutputStream("D:/a.txt");
		// DataOutputStream可以将各种各样的数据转换为二进制
		DataOutputStream dout = new DataOutputStream(out);
		String name = "zhangsan";
		int num = 100;
		float f = 100.8f;
		double d = 10088.00d;
		// 为了让解析工具知道这个字符串有多长，还会在字符串前面加前缀。
		// 表示这个字符串有多长，8个字节的字符串，还有两个字节的前缀，会写入10个字节
		dout.writeUTF(name);
		// 4个字节
		dout.writeInt(num);
		// 4个字节
		dout.writeFloat(f);
		// 8个字节
		dout.writeDouble(d);
		FileInputStream in = new FileInputStream("D:/a.txt");
		DataInputStream din = new DataInputStream(in);
		String readUTF = din.readUTF();
		System.out.println(readUTF);
		int readInt = din.readInt();
		System.out.println(readInt);
		float readFloat = din.readFloat();
		System.out.println(readFloat);
		double readDouble = din.readDouble();
		System.out.println(readDouble);
	}

}

class B{
	public static void main(String[] args) {
		
	}
}
